Chapter 5 Review and Application Questions

Chapter 5 Review and Application Questions - relationship...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Shawnae Cristobal Statistics Professor DeNike September 24, 2008 Box #283 Chapter 5: Review and Application Questions Pages 112-115 #s 2, 15-25 odd 2. (a) How spread out the scores and the distributions are (b) whether or not the behaviors were consistent with each other. 15. (a) Guchi. Because his standard deviation is larger, his scores are spread out around the mean, so he tends to be a more inconsistent student (b) Pluto. Because his scores are closer to the mean of 60, so it more accurately describes all of his scores (c) Pluto. Because we predict each will score at his mean score, and Pluto’s individual scores tend to be closer to his mean than Guchi’s are to his mean (d) Guchi. Because his scores vary more widely above and below 60 17. Predict the mean of 65 for each student. “Average error” is variance, so your error will be = Sx 2 6² = 36 19. She is computing the proportion of variance in exam scores accounted for by the
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: relationship with study time. 21. (a) compute the mean and sample standard deviation in each condition (b) changing conditions A,B,C changes dependent scores from around 11.00 to 32.75 to 48.00 respectively (c) the S x for the three conditions are .71, 1.09, and .71, respectively. These seem small, showing little spread, so participants scored consistently in each condition. 23. (a) Study A has a relatively narrow/skinny distribution; Study B has a wide/fat distribution. (b) In A, about 68% of the scores will be between 35(40 5) and 45(40 + 5); in B, 68% will be between 30(40 10) and 50(40 + 10) 25. (a) for conditions 1,2 ,and 3 we would expect s of about 13.33, 8.33, and 5.67, respectively (b) somewhat inconsistently, because based on s x wed expect a x of 4.51, 2.52,and 3.06, respectively....
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern